When Can I Drive After 1 Pint of Beer?
In the UK, Ireland, and many other countries, a pint is the standard pub serving. At 568 ml and 5% ABV, it contains 22.5g of ethanol — about 60% more than an American can of beer. This means BAC from one pint is meaningfully higher than from one standard US drink. Here is what the numbers look like.
Use our free BAC calculator to get a personalised estimate based on your weight, sex, and drinks.
Calculate Your BAC Now →The Math: How BAC Is Calculated
BAC is calculated using the Widmark formula: BAC = (ethanol grams × 100) / (weight_kg × r × 1000), where r = 0.68 for males and r = 0.55 for females, and weight_kg = lb / 2.205.
One pint of beer (568 ml / 20 fl oz at 5% ABV) contains approximately 22.5 grams of ethanol — equivalent to approximately 1.6 standard US drinks. This is common in the UK and Ireland where pints are the standard serving size. Alcohol is then eliminated at approximately 0.015% BAC per hour. The table below shows peak BAC (no metabolism during drinking) and the hours needed to reach key thresholds.
BAC Chart for 1 Pint of Beer by Weight and Sex
Peak BAC immediately after consuming 1 pint of beer, before any metabolism is applied. Hours to 0.08% and 0.00% are calculated from this peak at 0.015%/hr.
| Weight | Male BAC | Female BAC | Male → 0.08% | Female → 0.08% | Male → 0.00% | Female → 0.00% |
|---|---|---|---|---|---|---|
| 120 lb | 0.061% | 0.075% | Already under | Already under | 4.1 hrs | 5.0 hrs |
| 140 lb | 0.052% | 0.064% | Already under | Already under | 3.5 hrs | 4.3 hrs |
| 160 lb | 0.046% | 0.056% | Already under | Already under | 3.1 hrs | 3.7 hrs |
| 180 lb | 0.041% | 0.050% | Already under | Already under | 2.7 hrs | 3.3 hrs |
| 200 lb | 0.036% | 0.045% | Already under | Already under | 2.4 hrs | 3.0 hrs |
| 220 lb | 0.033% | 0.041% | Already under | Already under | 2.2 hrs | 2.7 hrs |
Use our free BAC calculator to get a personalised estimate based on your weight, sex, and drinks.
Calculate Your BAC Now →What If You Drank Over More Than 1 Hour?
A pint of beer typically takes 30–60 minutes to drink. If you took 1 hour to finish your pint, approximately 0.015% BAC was eliminated during drinking, reducing the effective peak BAC slightly for most adults.
What Factors Make Your BAC Higher or Lower?
- Body composition: Higher body fat percentage (less body water) means higher BAC per drink. Muscular individuals may have lower BAC than the table suggests.
- Food: Eating before or during drinking slows alcohol absorption and reduces peak BAC by up to 50%. The table assumes drinking without food.
- Drinking speed: Spreading drinks over more time allows metabolism to offset absorption, reducing peak BAC. The table shows worst-case (all drinks at once).
- Tolerance: Tolerance affects how drunk you feel, not your actual BAC. A high-tolerance drinker feels less impaired at 0.10% but is equally impaired on measurable tests.
- Medications: Many medications interact with alcohol and can raise effective BAC or increase impairment.
The Bottom Line: When Is It Safe to Drive?
After one pint of standard (5%) beer, most men above 160 lb are under 0.08% BAC, but women and lighter men may be at or near the limit. In countries with a 0.05% limit (Scotland, most of Europe), even heavier adults may be over the driving limit after one pint. Know the applicable legal limit for where you are driving.
The legal limit in most US states is 0.08%. Utah's limit is 0.05%. Commercial drivers face a 0.04% limit. International limits are often lower (0.05% in most of Europe, 0.02% in Sweden and Poland). If you are driving internationally or professionally, use the appropriate threshold.
When in doubt, do not drive. A ride-share, taxi, or designated driver is always the right call.
Use our free BAC calculator to get a personalised estimate based on your weight, sex, and drinks.
Calculate Your BAC Now →Frequently Asked Questions
Can I drive after 1 pint of beer?
For most adults above 160 lb (male), one pint of 5% beer produces a BAC under 0.08%. However, lighter individuals and most women will be close to or over the UK/EU limit of 0.08% (England/Wales) or 0.05% (Scotland/most of Europe). Check the table for your weight.
Is a pint the same as a standard drink?
No — a pint (568 ml) is 60% larger than a standard US drink (355 ml can) and contains about 22.5g of ethanol vs 14g. One pint equals approximately 1.6 standard drinks. This is why drink counts based on 'pints' will produce higher BAC than counts based on 'standard drinks.'
What about a pint of 4% session ale?
A pint of 4% beer contains 568 × 0.04 × 0.789 = 17.9g ethanol — less than a standard pint at 5%. A pint of 6% IPA contains 568 × 0.06 × 0.789 = 26.9g — significantly more. Always account for ABV.
Disclaimer: This article is for educational purposes only and does not constitute legal or medical advice. BAC estimates are approximations. Individual results vary based on body composition, food intake, health status, and other factors. Never drive if you feel impaired. When in doubt, don't drive.